Science / Geology / Seismic Discontinuity: A surface within the Earth across which P-wave or S-wave velocities change rapidly, usually by more than +~0.2 kilometer/second.
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Science / Geology / Seismic Refraction: A mode of seismic prospecting in which the seismic profile is examined for waves that have been refracted upward from seismic discontinuities below the profile. Greater depths may be reached than thro MORE
Science / Geology / Seismic Surface Wave: A seismic wave that follows the earth's surface only, with a speed less than that of S-waves. There are Raleigh waves (forward and vertical vibrations) and Love waves (transverse vibrations). MORE
Science / Geology / Seismic Transition Zone: A seismic discontinuity, found in all parts of the Earth, at which the velocity increases rapidly with depth: especially the one at 300 to 600 kilometers. MORE
Science / Geology / Seismicity: The study of the worldwide distribution of earthquakes over time and the probability of an earthquake occurring in a specific location. MORE
Science / Geology / Seismic Profile: The data collected from a set of seismographs arranged in a straight line with an artificial seismic source, especially the times of P-wave arrivals. MORE
Science / Geology / Seismic Discontinuity: A surface within the Earth across which P-wave or S-wave velocities change rapidly, usually by more than +~0.2 kilometer/second. MORE